Sufficient intake of Vitamin K has always been touted as necessary for heart disease, diabetes and cancer. Apart from these, there is one more reason to add more vitamin K rich foods to your diet that is for maintaining your bone health. Vitamin K is responsible for activating a protein that plays an essential role in blood clotting and calcium metabolism. It regulates the deposition of calcium on the bones. Moreover, vitamin K also prevents the accumulation of calcium in soft tissues by activating another protein called matrix GLA. The average daily vitamin K intake is 122 mcg for women and 138 mcg for men. Some common sources of vitamin K include broccoli, spinach, cabbage, and lettuce.